jan
25
2011
Het aardige van de toekomst is dat ze vandaag begint.
Marie-Louise von Franz
There are no separate systems. Where to draw a boundary depends on the questions we want to ask.
Donella H. Meadows
SprintHow To Solve Big Problems and Test New Ideas in Just Five DaysJake Knapp, John Zebratsky & Braden Kowitz
Bij Bol.com | Managementboek